| Title | Authors | Year | 
|---|---|---|
| Terrestrial SSSIs at risk from acidification in Scotland | Ross, A.… | 1993 | 
| Nitrogen and phosphorus concentrations and N:P ratios in Norwegian lakes. Perspective on nutrient limitation | Faafeng, B… | 1993 | 
| Terrestrial SSSIs at risk from soil acidification in Wales | Sketch, C.A… | 1993 | 
| Direct damage to vegetation caused by acid rain and polluted cloud: definition of critical levels for forest trees. | Cape, J.N… | 1993 | 
| Urban Air Quality in the United Kingdom. First Report of the Quality of Urban Air Review Group | Group,… | 1993 | 
| Reproduction in two submersed macrophytes declines progressively at low pH. | Titus, J.E… | 1993 | 
| Atmospheric deposition of sulphur and nitrogen in heathland ecosystems. | Bobbink, R… | 1993 | 
| The effect of external stress and disturbance factors on Calluna dominated heathland vegetation. | Berdowski,… | 1993 | 
| Salt-Marsh Processes - a Review | Vernberg, F… | 1993 | 
| Sphagnum species and polluted environments, past and future | Lee, J.A.;… | 1993 |